Head clamp



FIG. 1 is a side view of a head clamp, showing my new design;

FIG. 2 is a top perspective view thereof;

FIG. 3 is a bottom perspective view thereof;

FIG. 4 is a side view thereof in another condition;

FIG. 5 is a bottom perspective view thereof;

FIG. 6 is a top perspective view thereof;

FIG. 7 is a side view thereof in still another condition;

FIG. 8 is a bottom perspective view thereof; and,

FIG. 9 is a bottom perspective view thereof in still another condition. 

The ornamental design for a head clamp, as shown and described. 